Pura alegría.

alegria.rb

require "malone"
require "mote"
load('importer.rb')

mailer = Malone.connect(url: "smtp://foo%40localhost:pistola@localhost:1025",domain: "localhost")

data = File.read('mails.csv').encode("UTF-8", invalid: :replace, undef: :replace, replace: "?")

imported_data = Importer.import(data)

template = File.read('templates/mail.mote')
mote = Mote.parse(template, self, imported_data[0].keys)

imported_data.each do |obj|
  Malone.deliver(
    from: "test@localhost",
    to: obj["email"],
    subject: "Sorpresa!",
    text: mote.call(obj)
  )
end

importer.rb

# encoding: utf-8
module Importer

  class << self
    
    def import(stream)
      require 'csv'
      csv = CSV.parse(stream, :col_sep => ',', :quote_char => '"')
      fields = csv.shift
      csv.collect { |record| Hash[*fields.zip(record).flatten ] } 
    end
  end
end